RestoreBitmap Class Reference

Bitmap data structure that controls the progress of restore. More...

#include <restore.h>

Public Types
enum	State { State::UNRESTORED = 0, State::RESTORING = 1, State::RESTORED = 2 }

Public Member Functions
	RestoreBitmap (size_t size)
	~RestoreBitmap ()
size_t	get_size ()
bool	is_unrestored (unsigned i) const
bool	is_restoring (unsigned i) const
bool	is_restored (unsigned i) const
bool	attempt_restore (unsigned i)
void	mark_restored (unsigned i)
unsigned	get_first_unrestored () const
unsigned	get_first_restoring () const

Protected Attributes
std::atomic< State > *	states
const size_t	_size

Detailed Description

Bitmap data structure that controls the progress of restore.

The bitmap contains one bit for each segment of the failed volume. All bits are initially "false", and a bit is set to "true" when the corresponding segment has been restored. This class is completely oblivious to pages inside a segment – it is the callers resposibility to interpret what a segment consists of.

Member Enumeration Documentation

State

enum RestoreBitmap::State

strong

Enumerator
UNRESTORED
RESTORING
RESTORED

Constructor & Destructor Documentation

RestoreBitmap()

RestoreBitmap::RestoreBitmap ( size_t  size )

inline

~RestoreBitmap()

RestoreBitmap::~RestoreBitmap ( )

inline

Member Function Documentation

attempt_restore()

bool RestoreBitmap::attempt_restore ( unsigned  i )

inline

get_first_restoring()

unsigned RestoreBitmap::get_first_restoring ( ) const

inline

get_first_unrestored()

unsigned RestoreBitmap::get_first_unrestored ( ) const

inline

get_size()

size_t RestoreBitmap::get_size ( )

inline

is_restored()

bool RestoreBitmap::is_restored ( unsigned  i ) const

inline

is_restoring()

bool RestoreBitmap::is_restoring ( unsigned  i ) const

inline

is_unrestored()

bool RestoreBitmap::is_unrestored ( unsigned  i ) const

inline

mark_restored()

void RestoreBitmap::mark_restored ( unsigned  i )

inline

Member Data Documentation

_size

const size_t RestoreBitmap::_size

protected

states

std::atomic<State>* RestoreBitmap::states

protected

Get lowest false value and highest true value in order to compress serialized format. Such compression is effective in a single-pass or schedule. It is basically a run-length encoding, but supporting only a run of ones in the beginning and a run of zeroes in the end of the bitmap

---

The documentation for this class was generated from the following file:

• src/sm/restore.h